Spunding Valve (With Gauge) - Ball Lock

Spunding Valve (With Gauge) - Ball Lock

60 day no hassle return policy. Details

Due to high demand, this item is currently out of stock. Be the first to receive your items by placing a pre-order today. We will automatically ship this item to you when we receive more in early January.


A Spunding Valve is used to adjust and release pressure on a pressure capable fermenter, such as a Unitank.  It can  also be used to release pressure from a keg while filling or filtering. The relief valve can be adjusted to release pressure from 0-15 psi.

Caution: This Spunding Valve should never be used as the primary safety pressure relief device.  Every vessel that is under pressure should have a primary safety relief valve set in accordance with the pressure rating of the vessel. This Spunding valve should only act as a seondary relief that also allows you to adjust the pressure within the safety limits of the vessel or tank. 

How to Adjust: The pressure relief valve is adjusted by unscrewing the very end which reduces pressure on the spring. If tight, and not adjustable by hand, it needs to be loosened with pliers. Wrap a towel around the end piece of the pressure relief valve (about  the last 1/4 in) and loosen with pliers. Then finger tighten or loosen to your desired pressure.

Gauge reads 0 - 15 psi
Prebook Item: Please note this item is not currently in stock, but is available for Pre-Order. We do require payment in full in order to reserve stock.
Item # FIL42A
Weight 0.58 LBS
Community Q&A

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Why did you choose this?
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Planning on pressure fermenting
Jacob E B on Nov 16, 2021
The one that came as a kit is on back order
Dan B on Sep 2, 2021
Planning on pressure fermenting
Jacob E B on Nov 16, 2021
Nice price, really good place to buy
Cesar P on Nov 2, 2021
The one that came as a kit is on back order
Dan B on Sep 2, 2021
Pressure Fermentation
Corey O on Aug 4, 2021
To pressure ferment
Ryan C on Jul 31, 2021
to aid in pressure as I ferment in kegs
david e on Apr 29, 2021
Keg fermenting and pressurized fermenting
Colin W on Apr 14, 2021
I want to safely carbonate naturally in my Fermentasaurus
Glenn G on Mar 25, 2021
Need one for pressurise fermentation.
Kenneth C on Feb 16, 2021
My son-in-law is brewing beer.
Mike on Dec 10, 2020
gift item
Amy Beth J on Dec 4, 2020
Keg brewing
Adrian W on Nov 26, 2020
Pressure fermenter
Bob T on Nov 26, 2020
Lager ferment under pressure
Zach S on Nov 3, 2020
Fermenting under pressure and pressurized transfers
Louis LeBlanc on Nov 2, 2020
Pressurized fermentation.
MIKE MORGAN on Sep 18, 2020
fermenting under pressure
Francis J D on Aug 22, 2020
For making cider in a keg.
Jay S on Aug 18, 2020
Just getting into pressure fermenting.
Jeffrey V on Aug 8, 2020
Ships from USA and free shipping; reasonable price.
Vinton L on Jul 1, 2020
Quick Lagering. Also, it sounds like Sputnik
Casey Lee S on Jul 1, 2020
Co2 shortage is a comin'
Justin D on Jun 29, 2020
keg transfers and possibly primary fermentation in the keg
benjamin c l on Jun 19, 2020
Michael m on Apr 4, 2020
Old one leaks after repeated tightening
Hunter J on Mar 30, 2020
Pressure ferment
Steve l on Mar 27, 2020
Birthday gift
Kenneth T on Jan 23, 2020
To use on keg
Rick T on Jan 20, 2020
Need it to carb and ferment at the same rime
Ken H on Jan 4, 2020
Pressure transfer and carb under pressure
Mark N on Dec 9, 2019
Tired of manually purging Fermzilla
Alex Perkins on Dec 6, 2019
I want to see the pressure
Valued C on Dec 4, 2019
So I dont blow up my firmzilla.
Chip on Nov 22, 2019
Low O2 fermenting and natural carbonation
Christopher G on Nov 14, 2019
To measure pressure in Fermentor
John F on Nov 11, 2019
Gonna try some pressure fermenting.
LIAM PATRICK M on Nov 7, 2019
new item
Darrell H on Nov 5, 2019
Please email me if this is not the right spunding valve for the fermzilla
Christopher N on Oct 19, 2019
To ferment under pressure
Steven W on Sep 14, 2019
Want to ferment under pressure
Roger Taylor on Sep 14, 2019
need it
louie on Sep 7, 2019
to keep head pressure in pressure transfers from unitank to corney keg
David P on Jul 9, 2019
want to hop during fermentation
William H on Jul 3, 2019
To ferment in a corny keg
Chris D on May 21, 2019
Need to gauge my pressure accurately
Brendon M on May 20, 2019
Fermenting under pressure
John J on May 13, 2019
Um... I need a spunding valve.
Michael C on May 13, 2019
I'm very intrigued by pressurized fermentation and natural carbonation opportunities.
Steven S on Apr 30, 2019
Because i am hoping it will help me regulate pressure and not over pressurize my beer once I keg it
Chris G on Apr 19, 2019
For pressure fermenting
Richard S on Mar 12, 2019
Nice price, really good place to buy
Cesar P on Nov 2, 2021
Pressure Fermentation
Corey O on Aug 4, 2021

4.3 / 5.0
15 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Works as designed. Easy to clean. Delivered quickly.
March 27, 2021
9 months ago
Rated 5 out of 5
Love would buy again and would recommend to anyone.
March 1, 2021
9 months ago
Rated 3 out of 5
Hardware store scavenger hunt
Not nearly as simple of a solution as the Kegland spunding valve assembly. This is a cobbled bunch of brass fittings with a simple spring valve at the end. The weight of the assembly stresses the seal of the ball lock connection. I'll give it points for being solid and easy to move from place to place, but I wouldn't replace my Kegland duotite setup for fermentation.
April 18, 2020
1 year ago
Rated 4 out of 5
bought to presure ferment
works good, just a little tricky to get set at desired pressures.
February 15, 2020
1 year ago
Rated 4 out of 5
Sounding valve for fermentation under pressure .
Works well holding around 8 psi . Would have been a five star if there were instructions on setting a pressure.
User submitted image
User submitted image
User submitted image
November 25, 2019
over 2 years ago
Rated 4 out of 5
works fine
required tightening at all joint, which was really no trouble as I would check them as a rule anyway.
April 17, 2019
over 2 years ago
Rated 5 out of 5
Sounding valve
Item worked great. I got much more aroma dry hopping under pressure and beer was carbonated in keg much sooner.
March 26, 2019
over 2 years ago
Rated 5 out of 5
Must have, solid price, not ready out-of-the-box
I bought this in order to get into natural carbonation and pressure fermentation, and I just about love the thing. Obviously, it's easy to use (set a regular to target pressure and adjust the valve til it just barely vents), and it seems relatively sensitive, which is great.

The only caveat: mine came with a fitting that had no plumber's tape, which I applied, and the fittings were loose enough that I hemorrhaged CO2 until I soap-tested the thing and tightened it. Also, I looked into making one myself, and the price is very similar, so it's worth mentioning that this thing is a solid deal.

In summary: totally get this if you need it (you do or you don't), but be prepared to tighten it up - when in doubt, check each connection with soapy water while under moderate pressure
January 25, 2019
over 2 years ago
Rated 4 out of 5
To spund or not to spund
This thing is great i have been spunding like crazy since i got it.
December 2, 2018
over 3 years ago
Rated 4 out of 5
Works great after I tightened one side, it was leaking.
November 6, 2018
over 3 years ago